Furnace construction



y 193.1 R. LEVENTRY 1,358,172

FURNACE CONSTRUCTION Filed Sept. 15, 1926 A T TORN E Y6 V Patented July 19, 1932 UNITED STATES PATENT orno l:

BOY'L. Lnvamm or YOUNGSTOWN, OHIO, ABSIGIBTOB TO REPUBLIC 1301] AND STEEL OOIPAHY, O]? YOUNGSTOWN, OHIO, A CORPORATION 01' OHIO memos consraucrron Application fled September 15, 1926. Serial No. 185,547.

This invention relates to metallurgical fur: naces, and more particularly furnaces of the open hearth type. As well known, in apparatus of this character there is not only a 5 high temperature to be contended with but there is also more or less chemical action upon the surfaces with which the hot gases come in contact. Various attempts have been made to meet these drastic conditions by the use of 10 lining or wall-forming materials of general basic t e but satisfactory construction involvi th the chemical characteristics and the cient mechanical strength has not heretofore been realized to the extent demand.-

15 ed in the art. A wall construction therefore which embodies the qualities essential, and withal of reasonable cost and ready applicability is accordingly highly desirable.

To the accomphshment of the foregoing a0 and related ends, the invention, then, consists of the means hereinafter fully described,

and particularly pointed out in the claims,

the annexed drawing and the following description setting forth in detail certain fea- B6 turesembodying the invention, such disclosed means constituting, however, but few of various forms in which the principle of the invention may be used.

In said annexed drawing Fig. 1 is a vertical sectional view showing a furnace wall construction embodying my invention; and Fig. 2 is an enlarged sectional detail; and Fig. 3 is asimilar view of a modification.

The foundation and the sup rting structure 1 of the furnace may be 0 any usual or preferredconstruction, and the floor 2 may surfaced with magnesite or the like. As a surface for the walls,'and particularly the back wall, I employ chrome iron ore, the important content of which ma be represented as FeOCnO Thismay obtained in varyin grades and size of pieces, and where desire d may be, applied in plastic mass. Generally however, I refer to lay up the wall of lump materia may be roughly sized and shaped, at least for the immediate surface QlaLyer if desired. Ordinarily however, it is preferable to employ the material without a 60 special shaping operation and it is advantabase area, a support is had upon which the geous in this connection tolay out the an le of slope of the wall such as to favor a fsustaining condition. The slope may even be flattened out to the extent required b the angle of repose of the particular gra e of material being used. r.

By surfacing the floor with ma esite or the like, and providing underayers of bricks 2', and more especially around thewall chrome rock 3 may be laid up, more or less choice being used in the selection of the immediate surfacing pieces. A Show back 4 as customary may be arranged to take up the thrust of the roof arch 5 against the buckstays 6 which form the general outside framing. I may reenforce the wall at the back or outside by the use of billets 7, these being spaced along between the buckstays and the mass of chrome rock as laid up. Where it is desired to lessen the thickness re uired particularly at the base of a wall, prefer to arrange a reenforcement of plates 8, seating these at an angle under the skew back to the floor. Modified buckstays may be here int'erpwed if desired between the plates and the neral system of buckstays externally, or t ese may be combined in effect by one system of correspondingly shaped buckstags.

With a wall constructed along the lines escribed, a superior durability in performance is attained, and where the slope of the wall is flattened out as may bemost favorable to small sizes or irregular material, a corresponding reduction in labor and cost may be realized, as compared with where it is necessary to shape up or cut the blocks to be emplged.

her modes of applying the principle of my invention .may be employed instead of those explained; change being made as regards the features herein disclosed provided the means stated by any of the following claims or the equivalent of such stated means be employed. c a

I therefore particularly point out and distinctl claim as my invent1on:-

1. y o n-hearth furnace having a base, a roof su stantially co-extensive with the area of the base, backstays, and a back wall eeann between said base and said roof having a surface-retaining incline of refractory lump chrome iron ore held by a thickening of the wall in its lower portion, and by s aced billets, said billets engaging said bac 7 2. An 0 n-h eart furnace having a base, antially co-extensive with the roof sn area of the base, backstays, and a back wall between said base and said roof having a surface-retaining incline of refractory lump chrome iron ore held by a thickening of the wall in its lower portion, andby spaced billump lets said billets engagingnslaid backstaysg said ess formed 0 said having its full thic chrome iron ore. Signed by me this 9th day of September,

- PatcntNo. 1,868,172.

ROY L. LEVENTRY.

It is hereby certified that the name of theassignee in the above numbered patent Was erroneously described and specified as "Republic Iron and' Steel Com pany", whereas said name should have been described and specified as Republic Steel Corporation, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. 7

Signed and sealed this 29th day ofNovember, A. D. 1932.

M. J. Moore,

(Seal) Acting Commissioner of Patents.

face-retaining incline of refractory lump chrome iron ore held by a thickening of the wall in its lower portion, andby spaced billets said billets engagingnslaid backstays said w having its full thic ess formed of said lump chrome iron ore.

Signed by me this 9th day of September,

ROY L. LEVENTRY.

CERTIFICATE or CORRECTION.

- Patent No. 1,868,172. July 19, 1932.

Rev 1.. LEVENTRYQ It is hereby certified that the name of theassignee in the above numbered patent Was erroneously described and specified as "Republic Iron and' Steel Com pany", whereas said name should have been described and specified as Republic Steel Corporation, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. 7

Signed and sealed this 29th day ofNovember, A. D. 1932.

- M. J. Moore, (Seal) Acting Commissioner of Patents. 

